open the org.eclipse.riena.releng projectSet.psf file and checkout the projects that are listed there into your workspace

all the remaining "compile errors" are because there is no API baseline set, you can change the warning for that to ignore (in the Preferences) and you should have a workspace with no compile errors for 3.8

Start the Riena example based on 3.8

Target Platform 3.8 is still the activated one (from the setup)

Start the launcher "SWT Example Application", make sure you switch to the plugins tab and click "Add required plug-ins"

If all goes well that should bring up a working Riena example client

You can click in the navigation (left and top) and see the Riena navigation as it is supposed to work

Start the Riena example based on 4.2

Switch the Target Platform to 4.2

You get compile errors.

Open SubApplicationView

comment out the line in error (we use an internal Workbench method :-) and the if statement around it